A voting machine is tested in Madison County on Wednesday, March 7, 2012. (The Huntsville Times/Dave Dieter)

HUNTSVILLE, Alabama -- Friday is the last day to register to vote or make a name or address change to vote in the April 24 Republican primary runoff election.

Voters can print out a registration or change of address form online at www.madisoncountyal.gov/voter and print it out and deliver it in person to the Madison County Board of Registrars at the courthouse at 100 Northside Square, Huntsville, 35801-4820, or it must be postmarked by Friday at 5 p.m.

Alabama law does not allow the forms to be faxed or emailed, according to a news release from the board of registrars.

Voters who are unclear about their precinct number or voting location can go to www.madisoncountyal.gov/voter to find Madison County polling places and their location and directions and new precincts lines, can also be found there.